Datex-Ohmeda Aestiva 7900 SmartVent Technical Reference Manual page 132

5 Troubleshooting
Message Alarm type/
Priority
Low Paw high
(5)
Low V high
E
(5)
Low V medium
TE
Manifold Minimum
Pressure Monitoring
Sensor
(8) (9)
Failure
High Minimum
Pressure Monitoring
Limit
(8) (9)
Reached
Memory User Alarm
(EEPROM)
Fail
Memory Minimum
(flash) Shutdown
Failure
(6)
(7)
5-16
Enabling Criteria Alarm Condition
Removal Criteria
In-range Paw data Peak airway pressure <
available |P
min
consecutive seconds.
P
min
pressure during a
breath.
Alarm condition becomes false or transition from
mechanical ventilation on to off.
In-range flow data V < low limit
E
available and alarm
limit not = off
Alarm condition becomes false or volume alarms
state transition to standby (or off).
In-range flow data V
TE
available and alarm
limit not = off
Alarm condition becomes false or volume alarms
state transition to standby (or off).
Cal failure at bootup or
DPL switch engaged and
P
manifold
DPL engaged and Paw <
cm H
90
Pmanifold < 80
The system cannot Default settings are
access some stored used. Ventilation is still
values. possible but service is
necessary.
CRC failure
Service Repair
Check the breathing circuit for leaks.
| + 4 for 20
Check flow sensors hoses for leaks.
Perform flow sensor calibration.
is the baseline
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Check ventilator settings and volume output.
Check the breathing circuit.
Perform flow sensor calibration.
Replace the flow sensors.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
< low limit Check ventilator settings and volume output.
Check the breathing circuit and flow sensor
connections.
Perform flow sensor calibration.
Replace the flow sensors.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Check the breathing circuit.
Perform flow sensor calibration. If calibration
cm H O
< 80
fails, replace the SIB.
2
Check DPL switch for proper operation using
the service mode Test press. limit switch
check. If DPL switch test fails, replace the SIB.
Check the breathing circuit.
O
and
Perform flow sensor calibration. If calibration
2
cm H O
fails, replace the SIB.
2
Check the DPL switch for proper operation
using the service mode Test press. limit switch
check. If DPL switch test fails, replace the SIB.
Replace the CPU board.
Replace the CPU board.
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